Internal Standard

Hop-21(22)-ene (17ß(H)), 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1615-92-5

Atrazine-d5, 100µg/ml in Acetone, 1ml

2,5-Dimethylphenol, 100 µg/ml, Acetonitrile, 5ml